Cheap Flight Tickets from Seattle (SEA) to St Louis (STL), Starting at $276

Good to Know: Cheapest and Fastest SEA - STL Flights

Useful information for finding best airline tickets from Seattle Tacoma International to Lambert St Louis International on your next trip.

Cheapest Round Trip Flight

$734

AS Alaska Airlines • 1 stop • 10h 35m

Aug 28 – Aug 28

The cheapest round trip flight from Seattle to St Louis (SEA-STL-SEA) is currently $734

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Cheapest Direct Flight

$276

WN Southwest Airlines • nonstop • 6h 40m

Aug 28

The cheapest nonstop flight from Seattle to St Louis (SEA-STL) is currently $276

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Fastest Flight

5h 56m

The fastest nonstop flight from Seattle to St Louis (SEA-STL) takes 5h 56m

Latest Flight Deals from Seattle (SEA) to St Louis (STL)

Compare and book low fare round-trip air tickets from Seattle to St Louis. Ideal for travelers with confirmed return itineraries.

Aug 28 - Aug 28, Economy
AS
Seattle → St Louis
10h 35m
8:35 AM - 5:10 PM • 1 stop
AS
Seattle → St Louis
7h 3m
7:36 PM - 9:59 PM • nonstop
$734
Alaska Airlines
Aug 28 - Aug 28, Economy
AS
Seattle → St Louis
6h 41m
8:05 AM - 2:06 PM • nonstop
AS
Seattle → St Louis
7h 3m
7:36 PM - 9:59 PM • nonstop
$847
Alaska Airlines
Aug 28 - Aug 28, Economy
AA
Seattle → St Louis
13h 54m
5:50 AM - 4:24 PM • 1 stop
AA
Seattle → St Louis
7h 3m
7:36 PM - 9:59 PM • nonstop
$917
American Airlines
Aug 28 - Aug 28, Economy
DL
Seattle → St Louis
13h 37m
6:00 AM - 4:17 PM • 1 stop
DL
Seattle → St Louis
10h 14m
7:45 PM - 11:59 PM • 1 stop
$920
Delta Airlines
Aug 28 - Aug 28, Economy
UA
Seattle → St Louis
9h
5:00 AM - 12:40 PM • 1 stop
AA
Seattle → St Louis
7h 3m
3:04 PM - 5:27 PM • nonstop
$1197
United Airlines
Aug 28 - Aug 28, Economy
DL
Seattle → St Louis
9h 13m
5:45 AM - 1:38 PM • 1 stop
DL
Seattle → St Louis
10h 14m
7:45 PM - 11:59 PM • 1 stop
$1315
Delta Airlines

Fly from Seattle to St Louis with the Best Airfare Deals on FareLeaders

Looking for a cheap last-minute deal or the best round-trip flight from Seattle to St Louis? Find the biggest savings on one-way and round-trip tickets right here.

FAQs on Seattle to St Louis Flights

What are the airports in Seattle?
SEA
What’s the most popular airline flying from SEA to STL?
The most popular airline flying from Seattle to St Louis are
Can I fly from SEA to STL non-stop?
Yes, you can fly SEA to STL non-stop on
Which airlines fly nonstop between Seattle and St Louis?
The non-stop flights between Seattle and St Louis are .
What’s the earliest departure time from SEA to STL Airport?
The earliest flight leaves SEA at 5:00 am and lands in STL - Lambert St Louis International
What are the airports in St Louis?
STL
Can I make changes to my Seattle to St Louis flight tickets or cancel them on FareLeaders.com?
No. We are an airfare comparison site. All the tickets are booked by the travel agent offering the flight deal and any changes or cancellations to be made are directly done directly by them or the airlines.
Can I cancel my flight tickets from SEA to STL?
Read the fare rules of the Seattle to St Louis air tickets booked. Some airlines allow you to cancel the tickets within a stipulated time period with a cancellation fee.
Which airline alliances offer flights from Seattle and St Louis?
operate flights between Seattle and St Louis
How long does a flight from Seattle to St Louis take?
It takes approximately 4 hour to fly non-stop from SEA to STL, which is 1709.07 miles by air.
Which airlines provide the cheapest flights from Seattle (SEA) to St Louis (STL) ?
In the past couple of days, the cheapest tickets to STL from SEA were found on AS : USD 734
Do I need a passport to fly between SEA and STL?
No
What’s the latest departure time from SEA to STL ?
The last flight leaves SEA at 6:03 pm

Seattle (SEA) to St Louis (STL): Airport Information

Origin Airport Seattle Tacoma International , Seattle, US
Destination Airport Lambert St Louis International , St Louis, US
Distance 1709 miles

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